Update to 2018_v4 image and new build system. (#598)

* Revert "Force OpenCV to 3.1.0 (#602)"

This reverts commit 50ed55e8e2.

* Removes Simulation

* Removes old build system

* Removes old gtest

* Adds new gmock and gtest

* Updates to new ni-libraries

* removes MyRobot (to be replaced)

* moves files to new location

* Adds new sim backend and new test executables

* updates .styleguide and .gitignore

* Changes cpp WPILibVersion to a function

MSVC throws an AV with the old version.

* Disables USBCamera on all systems except for linux

* 2018 NI Libraries

* New build system

hal/src/main/native/include/HAL/Notifier.h

@@ -0,0 +1,30 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2016-2017. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#pragma once
+
+#include <stdint.h>
+
+#include "HAL/Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*HAL_NotifierProcessFunction)(uint64_t currentTime,
+                                            HAL_NotifierHandle handle);
+
+HAL_NotifierHandle HAL_InitializeNotifier(HAL_NotifierProcessFunction process,
+                                          void* param, int32_t* status);
+void HAL_CleanNotifier(HAL_NotifierHandle notifierHandle, int32_t* status);
+void* HAL_GetNotifierParam(HAL_NotifierHandle notifierHandle, int32_t* status);
+void HAL_UpdateNotifierAlarm(HAL_NotifierHandle notifierHandle,
+                             uint64_t triggerTime, int32_t* status);
+void HAL_StopNotifierAlarm(HAL_NotifierHandle notifierHandle, int32_t* status);
+#ifdef __cplusplus
+}
+#endif